Patents by Inventor Hans Radojewski

Hans Radojewski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for annealing thermoplastically-shaped plastics parts
    Patent number: 4594204
    Abstract: The present invention reduces within a short period of time the internal stresses in plastics bottles by annealing with infra-red radiation, in particular by specifically exposing critical points to radiation.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: June 10, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Heidenreich, Hans-Werner Depcik, Hans Radojewski
  • Laminates of polyethylene foam with an anisotropic pore structure
    Patent number: 4053341
    Abstract: A process for the production of cross-linked polyethylene foam layers which have an anisotropic pore structure in at least one internal layer, wherein at least three polyethylene sheets which contain equal quantities of peroxide as cross-linking agent and differing quantities of a chemical blowing agent are arranged as a multilayer structure in such a way that the two external layers are formed by the sheets which contain a smaller proportion of blowing agent, and the structure is heated, preferably in a continuous heating furnace, so that the individual sheets are cross-linked and at the same time welded together to form a laminate which is subsequently foamed by increasing the temperature to between 190.degree. and 250.degree. C.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: October 11, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Gerald Kleiner, Hans Radojewski, Richard Muhlbauer, Karl-Heinz Muller